Oceanic Systems Micro Trunk/Drop Cable 2m - 3812Oceanic Systems Micro Trunk Drop Cable 2m 3812 The NMEA2000 network comprises of a single trunk or backbone cable running through the length of the vessel with Tee Adaptors positioned where devices are to be attached to the network and a terminator at each end. The trunk or backbone cable can be created by either using made up cables or cordsets that come in a range of lengths or by running bulk cable and using field installable connectors where Tee